iii
About this manual........................................iv
Safety information.........................................1
General safety ...................................................... 2
Electrical safety .................................................... 3
Safety inspection guide ...................................... 5
Handling devices that are sensitive to
electrostatic discharge......................................... 6
Grounding requirements ................................... 6
Safety notices: multilingual translations.......... 7
Laser compliance statement............................. 14
Important service information ...................16
Strategy for replacing FRUs............................. 16
Strategy for replacing a
hard disk drive............................................. 17
Important notice for replacing a
system board ................................................ 17
Important information about replacing
RoHS compliant FRUs ...................................... 18
General checkout........................................19
What to do first .................................................. 20
Power system checkout .................................... 21
Checking the AC adapter........................... 21
Checking operational charging ................. 22
Checking the battery pack ......................... 22
Related service information.......................23
Restoring the factory contents by using
Recovery Disc Set .............................................. 23
Passwords........................................................... 24
Power-on password .................................... 24
Hard-disk password ................................... 24
Supervisor password .................................. 24
Power management .......................................... 25
Screen blank state ........................................ 25
Putting your computer to sleep................. 25
Shutting down the computer..................... 26
Lenovo B50-50 ............................................27
Specifications ..................................................... 27
Status indicators ................................................ 29
Hotkeys ............................................................... 30
FRU replacement notices.................................. 31
Screw notices................................................ 31
Removing and replacing an FRU.................... 32
1010 Keyboard ............................................. 33
1020 Optical drive ....................................... 35
1030 Base cover ............................................ 37
1040 Battery pack ......................................... 39
1050 Hard disk drive................................... 40
1060 DIMM ................................................... 42
1070 PCI Express Mini Card for wireless
LAN/WAN.................................................... 43
1080 Fan and heat sink assembly .............. 45
1090 System board ....................................... 46
1100 ODD transfer board............................ 48
1110 LCD unit and upper cover ................ 49
1120 LCD front bezel................................... 52
1130 LCD panel ............................................ 53
1140 LCD hinges .......................................... 55
1150 Antenna, LCD cable, and
integrated camera ........................................ 56
Locations ............................................................. 58
Top and front view ...................................... 58
Right-side view ............................................ 59
Bottom and left-side view .......................... 60
Parts list............................................................... 61
Overall ........................................................... 62
LCD FRUs ..................................................... 66
Keyboard....................................................... 68
Miscellaneous parts ..................................... 69
AC adapters.................................................. 70
Screws............................................................ 71
Power cords .................................................. 72
Notices .........................................................75
Trademarks......................................................... 76
Contents
